Base for an oil lamp



FIG. 1 is a perspective view of a base for an oil lamp in accordance with our new design;

FIG. 2 is a front elevational view thereof on an enlarged scale, the sides and rear being identical thereto;

FIG. 3 is a top plan view thereof on an enlarged scale; and,

FIG. 4 is a bottom plan view thereof on an enlarged scale.

The broken line showing of a glass oil lamp is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a base for an oil lamp, as shown and described. 